Sperm whale presence at eight different locations between 2012-2021 around Svalbard, Norway, detected using an automated detector and validated manually (visually on spectrograms, and aurally). Daily environmental data for all years and locations used for statistical models (Eastern Fram Strait & Isfjorden recording sites), and for plotting figures for each location.
For exact location coordinates, deployment periods and recording schemes, see Table 1 in publication.
Variables in “sperm_whale_vocal_presence_all_locations.xlsx” :
- Location == recording site
- Year == recording year
- Month == recording month
- Dttime == date and time (hour) of the recording
- Sperm_whale == sperm whale presence as ‘1’ for vocal presence and ‘0’ for vocal absence.
Variables in “environmental_data_all_locations.xlsx” :
- Date == Date (month/day/year)
- Chlorophyll_daily_mean == Daily chlorophyll concentration (mg/m-3) averaged over a 50km area around the hydrophone location
- Primary_production_daily_mean == Daily primary production concentration (mg/m-3) averaged over a 50km area around the hydrophone location
- Zooplankton_daily_mean == Daily zooplankton concentration (g/m-2) averaged over a 50km area around the hydrophone location
- Sea_surface_temperature_daily_mean == Daily sea surface temperature (°C) averaged over a 50km area around the hydrophone location
- Very_close_drift_ice == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- Close_drift_ice == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- Very_open_drift_ice == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- Open_water == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- Fast_ice == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- total_ice extent == Proportion of the 50km area around the hydrophone location that is covered by ice (all categories but “open_water” pooled together).
Environmental data were retrieved from reanalysis datasets using EU Copernicus Marine Service Information: Chlorophyll mass concentration and net primary production of biomass were obtained in 0.25° × 0.25° spatial resolution (https://doi.org/10.48670/moi-00019); zooplankton mass content expressed as carbon in sea water were obtained in 0.083° × 0.083° spatial resolution (https://doi.org/10.48670/moi-00020); and sea surface temperature was obtained in 0.05° × 0.05° spatial resolution (Goold et al., 2020; https://doi.org/10.3390/rs12040720). Daily sea ice data was retrieved from the Norwegian Meteorological Institute (https://cryo.met.no/) .
Short name: Norwegian Polar Institute, Ocean Acoustics Group of the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Data center contact
Name: Norwegian Polar Institute, Ocean Acoustics Group of the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany